Edited to add an answer to Deb’s question.
It’s funny and dark and has great music. Neil Patrick Harris is amazing in it (as is Felicia Day). It’s a comic book set to music. It’s by Josh Whedon, the guy who did Buffy the Vampire Slayer.
Acts I-III are available for free until tomorrow, then they’re supposed to go away. I bought them on iTunes, I liked them so much.
Click to the jump for one not-exactly-a-spoiler.
It doesn’t have a happy ending.

Why?
I watched all three acts and enjoyed. I love Joss Whedon’s stuff. I have watched every episode of Buffy, Angel, Firefly in sequence…